我有一个ArrayList,其中包含一些类对象,这些类对象在构造函数中具有变量,并具有getter,setter和toString()方法。所以我想用JSTL提供的标签遍历那个ArrayList。 toString()方法似乎不起作用。
<% //adding data to arraylist
List<Student> dataList = new ArrayList<Student>();
dataList.add(new Student("John", "Doe", false));
dataList.add(new Student("El", "Chappo", false));
dataList.add(new Student("Ciano", "Mehdol", false));
dataList.add(new Student("Lereone", "Zuba", true));
%>
公共类Student {//具有构造函数,getters / setters,toString()方法的基本模型类
private String firstName;
private String lastName;
private boolean goldCustomer;
public Student(String firstName, String lastName, boolean goldCustomer) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.goldCustomer = goldCustomer;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public boolean isGoldCustomer() {
return goldCustomer;
}
public void setGoldCustomer(boolean goldCustomer) {
this.goldCustomer = goldCustomer;
}
@Override
public String toString() {
return "Student [firstName=" + firstName + ", lastName=" + lastName + ", goldCustomer=" + goldCustomer + "]";
}
}
这里我正在遍历ArrayList:
<c:forEach var="listLoop" items="<%= dataList %>">
${listLoop}
<br/><br/>
</c:forEach>
除了toString()方法不起作用外,其他一切看起来都很好。
尝试做这样的事情:
<% //adding data to arraylist
List<Student> dataList = new ArrayList<Student>();
dataList.add(new Student("John", "Doe", false));
dataList.add(new Student("El", "Chappo", false));
dataList.add(new Student("Ciano", "Mehdol", false));
dataList.add(new Student("Lereone", "Zuba", true));
pageContext.setAttribute("list", dataList); <%-- to reference list into page scope --%>
%>
...
<c:forEach var="student" items="${list}">
<c:out value="${student}"/>
</c:forEach>